accounts: allow setting exact expiry date

set with a text input field which uses the same date parsing library as
the search function. Parsed expiry date will appear once you've typed
something in, so you can make sure it's right.

lang/admin/en-us.json

@@ -64,6 +64,7 @@
         "extendExpiry": "Extend expiry",
         "setExpiry": "Set expiry",
         "removeExpiry": "Remove expiry",
+        "enterExpiry": "Enter an expiry",
         "sendPWRManual": "User {n} has no method of contact, press copy to get a link to send to them.",
         "sendPWRSuccess": "Password reset link sent.",
         "sendPWRSuccessManual": "If the user hasn't received it, press copy to get a link to manually send to them.",
@@ -149,6 +150,7 @@
         "accountDisabled": "Account disabled: {user}",
         "accountReEnabled": "Account re-enabled: {user}",
         "accountExpired": "Account expired: {user}",
+        "accountWillExpire": "Account will expire on {date}",
         "userDeleted": "User was deleted.",
         "userDisabled": "User was disabled",
         "inviteCreated": "Invite created: {invite}",
@@ -219,6 +221,7 @@
         "errorCheckUpdate": "Failed to check for update.",
         "errorNoReferralTemplate": "Profile doesn't contain referral template, add one in settings.",
         "errorLoadActivities": "Failed to load activities.",
+        "errorInvalidDate": "Date is invalid.",
         "updateAvailable": "A new update is available, check settings.",
         "noUpdatesAvailable": "No new updates available."
     },